08-05-2019, 09:00 AM
quote:
[i]
I don't think an omnidirectional FM transmission could reach 5 miles at the 100mW ERP allowed by Part 15. I doubt their transmitter is less than 2W and my guess is that it's more like 5W.
my math shows at least a 20db margin at 5 miles. thats well within .5uV sensitivity of the average car radio nowadays. shave off some loss for coax, connectors, crappy antenna etc.. 5 miles.